Burma's newly elected civilian government announced Tuesday it will release more than 6,300 prisoners in an amnesty that could help patch up the country's human rights record and normalize relations with Western nations.

It was widely expected that many of the estimated 2,000 political prisoners in Burma, also known as Myanmar, would be among those freed, but the amnesty announcements broadcast on state radio and television did not supply any names.

Freedom for political detainees has been hotly anticipated as part of liberalizing measures since Burma's long-ruling military government handed power in March to a military-backed civilian administration.

"We welcome the amnesty announcement. This is very good news and we hope that many political prisoners will be among those freed," said Nyan Win, a spokesman for democracy movement leader Aung San Suu Kyi.

President Thein Sein, a former army officer who took office in March, has begun a dialogue with the democracy movement and promised other reforms that could start to reverse the harsh policies of decades of military rule.

The announcement said 6,359 inmates would be released beginning Wednesday under a humanitarian amnesty signed by Thein Sein for inmates who are old, disabled, unwell or who had shown good "moral behaviour."

No word on political prisoners

Relatives of political detainees were excited by the announcement, but wary, given that they could not be sure who would be among those released. Thein Sein instituted an earlier amnesty soon after taking office, but it included just a few dozen political detainees.

"We are waiting for the good news but we have not yet been contacted by authorities here," said Ma Nyein, sister-in-law of prominent comedian and activist Zarganar, who is serving a 35-year sentence in Myitkyina prison in northernmost Kachin State. She said she was unable to reach the prison by phone Tuesday.

Most prominent political prisoners, including many affiliated with ethnic minorities, are held in facilities far from the country's main city of Rangoon, in a policy apparently aimed at limiting their ability to communicate through visiting family members and lawyers.

Zarganar was arrested in 2008 after he gave interviews to foreign news media criticizing the junta's slow response to Cyclone Nargis, which left nearly 140,000 people dead or missing. He was convicted of causing public alarm and illegally giving information to foreign media.

The release of political detainees has been a key concern of the United States, which has been seeking to re-engage with Burma after isolating its former military government with political and economic sanctions over its poor record on human rights and democracy.

"We have made clear our desire to see continuing progress on issues such as prisoner releases" and other matters, U.S. Assistant Secretary of State Kurt M. Campbell said Monday during a lecture in the Thai capital, Bangkok.

Burma officials who have spoken privately of the release do not expect all of the country's 2,000 political detainees to be freed. But a failure to release a substantial number could be considered an inadequate gesture by Washington.

"There are clearly changes afoot, but we are at the early stages of that process and we are looking to see whether they will be sustained," said Campbell, the top U.S. diplomat for Asia.

The United States believes Burma's elections were flawed but has been encouraged by its liberalizing trend since the civilian administration took power, Campbell said.

"I think it would be fair to say that we will match their steps with comparable steps," he said.

The U.S. could ease restrictions on financial transactions and travel by top Burma officials, and also unblock aid by some multilateral agencies as well as resume its own assistance.